使用LINQ to Entities添加和更新

We are using L2E and REST in our project, and while I have been able to retrieve data from the db without issue, I am still not able to update or add new records to the db. I imagine that it's a syntax problem (we're still new to to linq), but I haven't been able to figure it out. We initially load the data in the dataservicecontext, and when updates are made they are stored in the We are using L2E and REST in our project, and w